A dilation of the veins that carry blood out of the scrotum. The resulting swollen vessels surrounding the testicles create a pool of stagnant blood, which elevates the scrotal temperature and is a major cause of male infertility.
A varicose vein of the vein of the testicle
Latin varix = vein and Greek kele = tumour, hernia, hence a varicose condition of the veins of the pampiniform plexus.